Electrical and Electronic Properties in Conducting-Insulating Polymers Composites and Its Applications

导电绝缘聚合物复合材料的电气电子性能及其应用

• 批准号: 06452219
• 负责人: YOSHINO Katsumi
• 金额: $ 4.8万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452219/
• 关键词: conducting polymer; insulating polymer; percolation; tunneling current; 複合体; フォトクロミック色素

In this study, a new type of conductor-insulator composites are prepared in which conducting polymer coated insulating polymers, whose size and shape are well controlled, are used as conductor and noncoated insulating polymer spheres are used as insulator. The dependence of electrical conductivity on concentration of coated insulating polymers near a percolation threshold is studied in detail. The conductivity is enhanced by more than 15 orders of magnitude when the concentration of conducting polymer-coated insulating polymer exceeding 2-5 vol%, which corresponds to an effective polypyrrole concentration of 0.01-0.03 vol%. The percolation threshold depends on the shape of the coated fiber of the insulating polymer but does not depend on the type of coated insulating polymer. The percolation threshold increases with decreasing length of polypyrrole-coated insulating fibers. The dependence of critical exponent on applied voltage is also studied. The critical exponent increase with increasing applied voltage, which can be explained by taking account of interparticle tunneling conduction in percolation model. The percolation threshold is also observed in the dependence of dielectric constant on the concentration of conducting polymer in the composite. The applications of conducting-insulating polymer composite have also been proposed.

本研究以尺寸和形状可控的导电聚合物包覆绝缘聚合物为导体，以未包覆的绝缘聚合物球为绝缘体，制备了一种新型的导体-绝缘体复合材料。详细研究了渗流阈值附近涂覆绝缘聚合物浓度对电导率的影响。当导电聚合物涂覆绝缘聚合物的浓度超过2-5vol%时，电导率提高了15个数量级以上，相当于有效的聚吡咯浓度为0.01-0.03vol%。渗流阈值取决于绝缘聚合物的涂层纤维的形状，但不取决于涂层绝缘聚合物的类型。渗流阈值随涂覆聚吡咯绝缘纤维长度的减小而增大。还研究了临界指数与外加电压的关系。临界指数随外加电压的增加而增大，这可以用渗流模型中的粒间隧道传导来解释。在介电常数与复合材料中导电聚合物浓度的关系中也观察到了渗流阈值。提出了导电-绝缘聚合物复合材料的应用前景。

项目成果

K.Yoshino, X.H.Yin, K.Tada, T.Kawai, M.Hamaguchi, H.Araki, R.Sugimoto, N.Uchikawa, T.Asanuma, M.Kawahigashi and H.Kato: "Novel Properties of New Type of Conducting and Insulating Polymers and Their Composites" IEEE Transactions of Dielectric and Electrica

K.Yoshino、X.H.Yin、K.Tada、T.Kawai、M.Hamaguchi、H.Araki、R.Sugimoto、N.Uchikawa、T.Asanuma、M.Kawahigashi 和 H.Kato：“新型

X. H. Yin, et al.: "Electrical Conduction by Percolation Process in Insulating Polymer Containing Small Amount of Conducting Polymer" Japanese Journal of Applied Physics. 33. 3597-3603 (1994)

X. H. Yin 等人：“含有少量导电聚合物的绝缘聚合物中渗流过程的电传导”，日本应用物理学杂志。

Xiao Hong Yin: "Electrical Conduction by percolation Process in Insulating Polymer with Conducting Polymer" Japanease Journal of Applied Physics. 33. 3597-3601 (1994)

肖红印：“绝缘聚合物与导电聚合物中渗透过程的电传导”日本应用物理杂志。

Katsumi YOSHINO: "Persistent Photoconductivity in C60-Doped Poly(3-alkylthiophene)" Japanease Journal of Applied Physics. 34. L127-L130 (1995)

Katsumi YOSHINO：“C60 掺杂聚（3-烷基噻吩）中的持久光电导性”日本应用物理学杂志。

X. H. Yin, et al.: "Percolation conducting in Polymer Composites Containing Polypyrrole Coated Insulating Polymer Fiber" Synthetic Metals. 69. 367-368 (1995)

X. H. Yin 等人：“含有聚吡咯涂层绝缘聚合物纤维的聚合物复合材料中的渗透传导”合成金属。